论文标题
罕见的魅力baryons
Rare radiative decays of charm baryons
论文作者
论文摘要
我们研究弱辐射$ |ΔC| = |ΔU| = 1 $衰减的诱人的抗triplett（$λ_c$，$ξ_c^{+} $，$ξ_c^{0} $）和sextet（$σ_c^{++++} +} $，$ξ_c^{\ prime 0} $，$ω_c$）在标准模型（SM）及以后的重子。我们可以解决$ su（2）$和$ su（3）_f $ -smmetry关系。我们建议研究自分析衰减链，例如$ξ_c^+ \ toσ^+（\ topπ^0）γ$和$ξ_c^0 \toλ（\ topπ^ - ）γ$，这启用了新的物理敏感性研究。 SM贡献可以通过对Cabibbo最佳衰变的相应分析来控制$λ_C^+ \ toσ^+（\ topπ^0）γ$和$ξ_c^0 \ toξ^0（\ toλπ^0）γ$。最初极化的重子，包括$λ_c\ topγ$，以及$λ_c\ toσ^+γ$衰减，或$ω_c\ to $ω_c\ to $λ_c\ to（λ，σ^0）γ$一起，可以提供SM的进一步测试。此外，对偶极子操作员的CP竞争新物理贡献可以提高最高百分之几的CP-ASMEMEMEMERIES。
We study weak radiative $|Δc|=|Δu|=1$ decays of the charmed anti-triplett ($Λ_c$, $Ξ_c^{+}$, $Ξ_c^{0}$) and sextet ($Σ_c^{++}$, $Σ_c^+$, $Σ_c^0$, $Ξ_c^{\prime +}$, $Ξ_c^{\prime 0}$, $Ω_c$) baryons in the standard model (SM) and beyond. We work out $SU(2)$ and $SU(3)_F$-symmetry relations. We propose to study self-analyzing decay chains such as $Ξ_c^+ \to Σ^+ (\to p π^0) γ$ and $Ξ_c^0 \to Λ(\to p π^-) γ$, which enable new physics sensitive polarization studies. SM contributions can be controlled by corresponding analysis of the Cabibbo-favored decays $Λ_c^+ \to Σ^+ (\to p π^0) γ$ and $Ξ_c^0 \to Ξ^0 (\to Λπ^0) γ$. Further tests of the SM are available with initially polarized baryons including $Λ_c \to p γ$ together with $Λ_c \to Σ^+ γ$ decays, or $Ω_c \to Ξ^0 γ$ together with $Ω_c \to (Λ,Σ^0) γ$. In addition, CP-violating new physics contributions to dipole operators can enhance CP-asymmetries up to few percent.
